Prep: Preheat oven to 350°F (175°C). Grease and flour a Bundt pan.
Dry Mix: Whisk flour, baking powder, and salt in a bowl. Set aside.
Cream Butter & Sugar: Beat butter and sugar until fluffy (~3 mins). Add eggs one at a time, then mix in lemon zest, juice, and vanilla.
Alternate Wet/Dry: Add flour mix in 3 parts, alternating with milk/yogurt. Mix until just combined.
Bake: Pour batter into the pan. Bake 45–50 mins or until a toothpick comes out clean. Cool in pan for 15 mins, then invert onto a rack.
Glaze: Whisk powdered sugar and lemon juice until smooth. Drizzle over cooled cake. Garnish with zest.